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Diffstat (limited to 'fs/btrfs/extent_map.h')
-rw-r--r--fs/btrfs/extent_map.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 1195f09761fe..679225555f7b 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -13,6 +13,7 @@
#define EXTENT_FLAG_COMPRESSED 1
#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
+#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
struct extent_map {
struct rb_node rb_node;
@@ -20,18 +21,23 @@ struct extent_map {
/* all of these are in bytes */
u64 start;
u64 len;
+ u64 mod_start;
+ u64 mod_len;
u64 orig_start;
u64 block_start;
u64 block_len;
+ u64 generation;
unsigned long flags;
struct block_device *bdev;
atomic_t refs;
unsigned int in_tree;
unsigned int compress_type;
+ struct list_head list;
};
struct extent_map_tree {
struct rb_root map;
+ struct list_head modified_extents;
rwlock_t lock;
};
@@ -60,7 +66,7 @@ struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void extent_map_exit(void);
-int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len);
+int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
#endif